Cleaning fuel injectors?

BOBI87

MEMBER
1996 NISSAN SUNNY

Hi, this question is also related to my previous question as far as I can see. I have checked my car's fuel injectors with analog multimeter by selecting ohm scale. In analog meter with ohm scale selected if you touch both leads together meter's needle moves to zero or completely right side. Same thing happened when I connect both leads to all fuel injectors one by one. Leads are not touching each other while checking. I saw video on youtube how to check fuel injectors they have showed that fuel injectors must have a resistance range from 12-17 ohm. If one fuel injector has 16 ohm other should have 16.5 or 15.5 ohm. But in my case its showing that fuel injectors are short I think. Is it the reason my car engine is not working properly on unleaded supreme. Also tell me how to clean fuel injectors and if buying new is only option what spec should be consider while buying. Answer my question as soon as possible because its very frustrating.

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

In general, you are correct that injectors have around 16 ohms of resistance.

However, basically you need to check one and then the others need to be close.

Here is a guide on how to properly check the injectors as I am not sure you did this:

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

If they are not pulsing, then you may have a control issue but if they are pulsing and still have no fuel then that injector has failed.

https://www.2carpros.com/articles/how-to-replace-a-fuel-injector

It is highly unlikely that you have failed all of them at the same time, so I suspect you have another issue.

So, let's start with testing them to find out if they are pulsing which will tell us if they are ok or not.

If they are not pulsing then we need to check for codes and find out what is there.

Here is a guide that will help with this:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

As for cleaning them, we do not need to do that in most cases but to do it, you just run some of that injector cleaner through them on a regular basis.

Let's run through this and we can go from there.

Thanks